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This class can meet the basic requirements, but if we put a class like this without thread safety protection into a multi-threaded environment, there will definitely be problems. How to solve them? The first thing we think of is adding the synchronized keyword to the getInstance method, as follows:黎巴嫩小村庄里的少年拉比，虽然双眼全盲却深具音乐天赋，因出国演 出需申请新护照，意外发现自己的身份证明是伪造！惊觉自己活在谎言 之中的惊恐与愤怒席卷而来，无论少年如何追问，却无人能说明真相。 在中东民谣的悠扬乐音中，少年唱出淡然却真切的哀伤及惆怅。导演透过盲眼者的比喻，影射黎巴嫩被战争撕裂及毁灭的黑暗史。In short, the proxy mode provides an interface consistent with the real class, which is intended to be used to proxy the class to access the real class, the skin mode is intended to simplify the interface, and the adapter mode is intended to transform the interface.France: 1,240,000The coefficient is the percentage we see when we click on an ordinary attack with the mouse.Hulu与漫威联合开发的剧集《离家童盟》正式宣布续订第三季。第三季共10集，视角将更集中于剧中的孩子们，扮演父母的10位常规卡司有7位将不再出演。After listening to something wrong, he said that the ship broke down and the submarine main valve was opened. Only Wang Yanlong knew where the main valve was. At that time, the water was flowing very fast. There was a pump that pumped out all the water. After the whole system was adjusted, it was not easy to work.